Helical pier



FIG. 1 is a perspective view of an embodiment of my new, original and ornamental design;

FIG. 2 is a front view thereof;

FIG. 3 is a right side view thereof, the left side view being a mirror image;

FIG. 4 is a rear view thereof;

FIG. 5 is an enlarge top view thereof; and

FIG. 6 is an enlarged bottom view thereof;

FIG. 7 is perspective view of a further alternative embodiment of my new, original and ornamental design;

FIG. 8 is a front view of the embodiment of FIG. 7;

FIG. 9 is a right side view of the embodiment of FIG. 7, the left side view being a minor image;

FIG. 10 is a rear view of the embodiment of FIG. 7;

FIG. 11 is an enlarged top view of the embodiment of FIG. 7; and,

FIG. 12 is an enlarged bottom view of the embodiment of FIG. 7.

The structure shown in phantom is for illustrative purposes only and forms no part of the claimed design. 

The ornamental design for a helical pier, as shown and described. 